+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   P/2010 R2 (La Sagra) Classification: Encke-type Comet          SPK-ID: 1003104 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2455478.5 (2010-Oct-09.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .153756052876918 4.0804e-06   a 3.099125122794778 2.7292e-05 AU q 2.622615876542159 1.8652e-05 AU i 21.39454010300315 4.1892e-05 deg node 270.7283394052602 0.00038286 deg peri 59.53798847616865 0.0031227 deg M 19.02474271714935 0.0021988 deg tp 2455373.189085457073 (2010-Jun-25.68908546) 0.010904 JED period 1992.769615816092 5.46 0.026323 7.207e-05 d yr n .1806530956427547 2.3863e-06 deg/d Q 3.575634369047397 3.1488e-05 AU   Orbit Determination Parameters    # obs. used (total)      371      data-arc span      382 days (1.05 yr)      first obs. used      2010-08-12      last obs. used      2011-08-29      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      3      fit RMS      .56164      data source      ORB      producer      Otto Matic      solution date      2011-Nov-18 10:51:02   Additional Information  Earth MOID = 1.67257 AU   T_jup = 3.099  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 6.5 mag 0.6 17 from 78 observations, assumed slope, autocmod 2.5a comet total magnitude slope K1 25.   n/a 17 autocmod 2.5a comet nuclear magnitude M2 15.5 mag 0.4 17 from 273 observations, autocmod 2.5a comet nuclear magnitude slope K2 5.   n/a 17 autocmod 2.5a comet nuclear phase coefficient PC 0.03   n/a 17 autocmod 2.5a [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2010.5   P/2010 R2        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2013-May-20 08:52 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin